Frequently Asked Questions
What are UOP L and T?UOP L and T powders and pastes are highly effective
moisture scavengers for many plastics and coatings
systems. These powders and pastes are molecular sieve
zeolites; they have a crystal structure of the zeolite A
type and the following chemical composition:
(M = alkali cation)
The zeolite structure consists of SiO4 and
tetrahedrons, which are linked to one another to form a
three-dimensional network. The structure of this network
is such that, inside the crystal lattice, large
adsorption cavities are formed, which are connected to
one another by channels of defined and absolutely
This diameter depends on the type of cation and is approximately 4 Ůgstrom units in the case
of UOP T Powder and Paste and approximately 3 Ůgstrom
units with UOP L Powder and Paste (1 Ůgstrom = 10-8
cm). The only molecules that can be adsorbed are those
smaller than the diameter of the pores. This means water
can be adsorbed, but the raw materials for plastics,
coatings systems and adhesives cannot.
SamplesSamples of L Powder, L Paste, T
Powder, and T Paste are available upon request. Samples
come in one pound quantity.
Call 724-942-3090 for more information and pricing.